CA2172634A1 - Device for conveying refuse into a pyrolysis reactor - Google Patents
Device for conveying refuse into a pyrolysis reactorInfo
- Publication number
- CA2172634A1 CA2172634A1 CA002172634A CA2172634A CA2172634A1 CA 2172634 A1 CA2172634 A1 CA 2172634A1 CA 002172634 A CA002172634 A CA 002172634A CA 2172634 A CA2172634 A CA 2172634A CA 2172634 A1 CA2172634 A1 CA 2172634A1
- Authority
- CA
- Canada
- Prior art keywords
- pyrolysis reactor
- conveyor pipe
- refuse
- inlet tube
- conveying device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B51/00—Destructive distillation of solid carbonaceous materials by combined direct and indirect heating
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B1/00—Retorts
- C10B1/10—Rotary retorts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/20—Rotary drum furnace
- F23G2203/212—Sealing arrangements between rotary and stationary parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2205/00—Waste feed arrangements
- F23G2205/12—Waste feed arrangements using conveyors
- F23G2205/121—Screw conveyor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2205/00—Waste feed arrangements
- F23G2205/14—Waste feed arrangements using hopper or bin
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2900/00—Special features of, or arrangements for incinerators
- F23G2900/52001—Rotary drums with co-current flows of waste and gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/07002—Injecting inert gas, other than steam or evaporated water, into the combustion chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/07008—Injection of water into the combustion chamber
Abstract
The conveying device (2) for refuse (A) has a refuse feed chute (4), which is connected laterally to a conveyor pipe (8). A conveyor screw (14) drivable by a motor (20) is located in the conveyor pipe (8), in the longitudinal direction thereof. The conveyor pipe (8) discharges into a pyrolysis reactor (10), in particular into an low-temperature carbonization drum operated for example in conjunction with the low-temperature carbonization combustion process. To make it possible to supply to the interior with good sealing, it is provided according to the invention that at least one supply line (32), which leads from the outside into the pyrolysis reactor (10), is accommodated in the space (30) between the housing (8a) of the conveyor pipe (8) and the pyrolysis reactor (10).
Description
21726~
L ~ J'-SPECIFICATION
DEVICE FOR CONVEYING REFUSE IN A PYROLYSIS REACTOR
The invention relates to a device for conveying refuse, in which a refuse feed chute is connected to a conveyor pipe, in the longitudinal direction of which a screw conveyor, drivable by a motor is disposed, and in which the conveyor pipe discharges into a pyrolysis reactor, in particular into a low-temperature carbonization drum that is rotatable about its longitudinal axis. The conveyor pipe is used for thermal waste disposal, especially according to the low-temperature carbonization combustion process.
In the field of refuse disposal, the so-called low-temperature carbonization combustion process has become known. The process and a system operating by it for thermal refuse disposal are described for instance in European Patent Disclosure EP-A-302 310 and German Patent Disclosure DE-A-38 30 153. The system for thermal refuse disposal by the low-temperature carbonization combustion process includes as its essential components a pyrolysis reactor and a high-temperature combustion chamber. The pyrolysis reactor converts the refuse, fed via a refuse conveyor of the type referred to at the outset, into low-temperature carbonization gas and pyrolysis residue. The 217263 i low-temperature carbonization gas and the pyrolysis residue are then delivered, after suitable preparation, to the burner of the high-temperature combustion chamber.
This produces molten slag, which can be removed via an outlet and which is in vitrified form after it cools down.
Via a flue gas line, the flue gas produced is sent to a chimney serving as an outlet. A refuse heat steam generator as a cooling device, a dust filter system, and a flue gas cleaning system, in particular, are built into this flue gas line. There is also a gas compressor in the flue gas line, which is disposed directly at the outlet of the flue gas scrubber system and can be embodied as a suction draft blower. The built-in gas compressor serves to carry gas through the system and in particular serves to maintain a negative pressure - however slight - in the pyrolysis drum. As a result of this negative pressure, low-temperature carbonization gas is prevented from passing out to the environment through the ring seals of the pyrolysis drum.
By means of the conveying device, refuse of various kinds, such as comminuted household garbage, industrial refuse similar to household garbage, and comminuted bulk trash, but also dewatered sludge, is fed to the low-temperature carbonization drum.
It has been found that in an low-temperature carbonization system, the conveying device for refuse can be blocked or destroyed if excessively large particles of refuse drop from the refuse feed chute into the coil of the conveying screw. However, the avoidance of blockage of the conveying screw is necessary for continuous operation;
after all, new trash or refuse is as a rule supplied continuously. For problem-free conveying of the refuse it is also necessary that the refuse not stick to the screw or rotate with the screw coil. To achieve this, it is usual in conveying screws to dispose strips on the housing of its wall that protrude into the interstice between the conveying screw and the housing. When the conveying screw rotates, the material to be conveyed is prevented from rotating with the screw by the strips on the screw.
However, such strips are subject to severe wear.
From German Patent Applications DE-A 38 30 151, DE-A 38 30 152 and DE-A 38 30 153, pyrolysis reactors with a heater for refuse are known, in which supply lines are provided with outlet nozzles for air on the end for the sake of direct heating of the refuse in the low-temperature carbonization drum. These supply lines are extended through a hot gas housing on the low-temperature carbonization drum. The known constructions require special and therefore expensive sealing provisions.
The object of the invention is to embody a conveying device for refuse of the type referred to at the outset in such a way that it is possible to lay at least one supply line, which is intended to lead from outside into the pyrolysis reactor, with comparatively little effort or expense.
This object is attained in accordance with the invention in that at least one supply line leading from outside into the pyrolysis reactor is disposed in the space between the housing of the conveyor pipe and the pyrolysis reactor.
Blockage of the conveying screw should be avoided as much as possible. To prevent the refuse from rotating with the conveying screw, it may be provided that a deflection space exists between the conveying screw and the housing.
This space is formed by providing that from the longitudinal axis of the conveying screw, measured outward at right angles to the longitudinal axis, a variably large spacing remains free between the largest radius of the conveying screw and the housing wall, depending on the radial direction in which measurement is done. This assures that the conveyed refuse can come loose from the conveying screw from time to time, so that it does not rotate with the conveying screw.
Advantageously, no strips need to be attached to the inner wall of the housing as was previously usual for preventing the material from rotating with the conveying screw.
While such strips are subject to major wear, the present ~172634 conveying device can be operated largely with little wear.
The housing has a circular cross section, for example.
In a preferred exemple, the housing has a polygonal cross section. This polygonal cross section may be a trough-shaped cross section, with a lower polygonal part and an upper rectangular part. It may also be a polygon with sides of equal length.
These embodiments as well have the effect that the refuse to be conveyed will not rotate with the conveying screw.
The supply line or lines can serve any possible purposes, such as supplying air to the pyrolysis reactor.
It is preferably provided that the pyrolysis reactor commlln;cates on the inlet side with an inlet tube; that the conveyor pipe is sealed off on its end inside the inlet tube and is disposed stationary; and that the supply line is extended through the space between the inlet tube and the conveyor pipe.
The conveying device can be used at the inlet and/or the outlet of the pyrolysis reactor. In general terms, this involves a conveying device for feeding refuse into or discharging it out of a pyrolysis reactor rotatable about its longitudinal axis, which is preferably characterized by ~17263~
a) a tube, secured to the pyrolysis reactor, which is rotatable with the pyrolysis reactor about its longitudinal axis, b) a sealing ring secured to the end of the tube, c) a stationary conveyor pipe protruding into the tube, d) a counterpart ring for the sealing ring, the counterpart ring being secured to the outer circumference of the conveyor pipe, and e) at least one supply line, which leads from outside into the interior of the pyrolysis reactor via the space between the housing of the conveyor pipe and the tube.
Further advantageous features are defined by the dependent clalms .
Exemplary embodiments of the invention will be described below in further detail in conjunction with two drawing figures. Shown are:
Fig. 1, a conveying device for refuse, as part of an low-temperature carbonization system, seen in longitudinal section; and ~172634 Fig. 2, a lateral section in the direction II-II of Fig.
1.
In Fig. 1, a conveying device 2 for refuse A is provided, in which a drop chute or refuse feed chute 4 is connected via disconnectable securing means 6 to a stationary conveyor pipe 8. The conveyor pipe 8 here is embodied as a conveying screw trough. Its housing 8a has a preferably polygonal cross section, as shown in Fig. 2. The longitudinal axis of the housing 8a is shown at 9. The conveyor pipe 8 discharges into a pyrolysis reactor 10, in the present case an low-temperature carbonization drum rotating about its longitudinal axis 11, which is equipped with a relatively large number of heating tubes 12 parallel to the longitudinal axis 11. The heating tubes 12, only two of which are shown in Fig. 1 and 48 of which are shown in Fig. 2, are charged with hot gas h, such as hot air. They are firmly fastened in an end ring 12s, which is concentrically adjoined by an inlet tube 13. The end of the conveyor pipe 8 is located concentrically within this inlet tube 13. As will be described hereinafter, provision is made at that point for good sealing.
In the interior of the conveyor pipe 8, which in normal operational is stationary, there is a conveying screw 14, whose longitudinal axis 15 extends in the longitudinal ~7263~
direction thereof. The shaft 16 of the conveying screw 14 is driven via a gear 18 by a motor 20. The refuse feed chute 4 is disposed laterally of or vertically above the conveyor pipe 8, on its end. The fill opening for the refuse is marked 22, and the discharge opening is marked 24.
When refuse A is conveyed from the drop chute 4 to the low-temperature carbonization drum 10, it is necessary both to prevent oxygen from the air from reaching the low-temperature carbonization drum 10 from the inlet opening 22 via the discharge opening 24, and to prevent low-temperature carbonization gas from reaching the environment from the low-temperature carbonization drum 10 through the fill opening 22 in countercurrent with the conveyed refuse A. To do so, a middle portion 14a of the conveying screw 14 has a lesser pitch than the remainder of the conveying screw 14 or the initial portion 14b. As a result it is attained that the conveyed refuse A is more severely compacted in the region of this middle portion 14a than in the other regions, and as a result in the region of the portion 14a of the conveying screw 14 virtually the entire portion of the space in the housing 8a of the conveyor pipe 8 is filled with the refuse A.
The conveyed refuse A itself seals the housing 8a in gas-tight fashion there. Air cannot flow from the fill opening 22 to the discharge opening 24, and low-217263i temperature carbonization gas cannot flow in the oppositedirection. Downstream in the conveying direction of the compacting zone, which is located in the region of the portion 14a of the conveying screw 14, the conveying screw 14 again has a greater pitch. As a result, the packing of the refuse A, which packing extends over the entire cross section of the conveyor pipe 8, is loosened up again.
One important factor is that because of the geometrical arrangement, at least one supply line 32 leading from outside into the pyrolysis reactor 10 is disposed in the space 30 between the housing 8a of the conveyor pipe 8 and the pyrolysis reactor 10. In the present case, as shown in Fig. 2, there are three supply lines 32. The space 30 in question is located here between the housing 8a and the inlet tube 13. The supply lines 32 are located in the "free corners" outside the housing 8a. The supply lines 32 are intended for example for introducing air l, inert gas, water, or water vapor, which may be superheated. The air l introduced can be used for partial combustion of low-temperature carbonization gas in the pyrolysis reactor 10. Two air outlet nozzles or combustion nozzles on the supply line 32 are shown at 35 in Fig. 1. By introducing superheated steam, the refuse in the pyrolysis reactor is heated and dried directly.
Another significant factor is good sealing of the pyrolysis reactor 10 from the outside. To that end, a ~17263~
slide ring seal 40 is disposed on the end of the inlet tube 13. It comprises a co-rotating slide ring 42 and a stationary counterpart ring 44, both of which may be made of steel. The counterpart ring 44 is firmly attached to a ring 46, which is welded to the housing 8a with the aid of a weld seam 48.
To enable closing off the housing 8a of the conveyor pipe 8 in gas-tight fashion by means of the conveyed refuse A, the conveying device 2 should be operated fully filled.
To prevent relatively large, hard pieces of refuse A from blocking the conveying screw 14, variously located and configured deflection spaces 34 for such relatively large pieces may be provided inside the housing 8a, because of the geometrical shaping. In other words: The conveyor pipe 8 can have not merely the polygonal cross section shown but other cross sections instead. When the conveying screw 14 is rotating, the relatively large pieces to be conveyed are forced into these deflection spaces 34 and are transported along with the longitudinally moved refuse A in the deflection spaces 34, so that they cannot block the conveying screw 14. The deflection spaces 34 are as a rule located above or to the side of the conveying screw 14.
In Fig. 1, the refuse A in the rotating low-temperature carbonization drum is heated indirectly by the hot gas h by means of the heating tubes 12. This hot gas h is fed into the low-temperature carbonization drum 10 via a stationary hot-gas inlet housing ~not shown). The parallel heating tubes 12 are secured by one end to the bottom wall of the drum. The other end is secured to the bottom wall 12s, which forms a portion of the wall of a "cold" hot-gas outlet housing 50. From this housing 50, the hot gas h enters an outlet. To seal off the hot-gas outlet housing 50 from the rotating tube 10 and from the inlet tube 13, ring seals 52 and 54, respectively, are provided. Ring seals (not shown) are correspondingly provided to seal off the hot-gas inlet housing. From the interior of the low-temperature carbonization drum 10, or more precisely from the "hot" tube bottom, a discharge tube (not shown) is extended into the interior of a stationary discharge device. The low-temperature carbonization material entering this discharge device via the discharge tube is split, in the discharge device, into low-temperature carbonization gas and residue. The latter can be split and sorted out into various combustible and inert fractions by means of a suitable device (not shown) by the low-temperature carbonization combustion process, before the combustible portion is taken for combustion in a high-temperature combustion chamber (not shown).
It should also be pointed out that instead of or in addition to at least one supply line 32, it is naturally possible for an extraction line as well to be disposed in the space 30 between the housing 8a of the conveyor pipe 8 ~7263~
the space 30 between the housing 8a of the conveyor pipe 8 and the pyrolysis reactor 10 (or its inlet tube 13). This extraction line can serve for instance as a suction extraction tube for removing water vapor from the interior of the pyrolysis reactor 10. It should also be noted that a supply and/or extraction line 32 may be disposed at the outlet of the pyrolysis reactor 10, instead of the inlet, using an outlet tube that corresponds to the inlet tube 13.
L ~ J'-SPECIFICATION
DEVICE FOR CONVEYING REFUSE IN A PYROLYSIS REACTOR
The invention relates to a device for conveying refuse, in which a refuse feed chute is connected to a conveyor pipe, in the longitudinal direction of which a screw conveyor, drivable by a motor is disposed, and in which the conveyor pipe discharges into a pyrolysis reactor, in particular into a low-temperature carbonization drum that is rotatable about its longitudinal axis. The conveyor pipe is used for thermal waste disposal, especially according to the low-temperature carbonization combustion process.
In the field of refuse disposal, the so-called low-temperature carbonization combustion process has become known. The process and a system operating by it for thermal refuse disposal are described for instance in European Patent Disclosure EP-A-302 310 and German Patent Disclosure DE-A-38 30 153. The system for thermal refuse disposal by the low-temperature carbonization combustion process includes as its essential components a pyrolysis reactor and a high-temperature combustion chamber. The pyrolysis reactor converts the refuse, fed via a refuse conveyor of the type referred to at the outset, into low-temperature carbonization gas and pyrolysis residue. The 217263 i low-temperature carbonization gas and the pyrolysis residue are then delivered, after suitable preparation, to the burner of the high-temperature combustion chamber.
This produces molten slag, which can be removed via an outlet and which is in vitrified form after it cools down.
Via a flue gas line, the flue gas produced is sent to a chimney serving as an outlet. A refuse heat steam generator as a cooling device, a dust filter system, and a flue gas cleaning system, in particular, are built into this flue gas line. There is also a gas compressor in the flue gas line, which is disposed directly at the outlet of the flue gas scrubber system and can be embodied as a suction draft blower. The built-in gas compressor serves to carry gas through the system and in particular serves to maintain a negative pressure - however slight - in the pyrolysis drum. As a result of this negative pressure, low-temperature carbonization gas is prevented from passing out to the environment through the ring seals of the pyrolysis drum.
By means of the conveying device, refuse of various kinds, such as comminuted household garbage, industrial refuse similar to household garbage, and comminuted bulk trash, but also dewatered sludge, is fed to the low-temperature carbonization drum.
It has been found that in an low-temperature carbonization system, the conveying device for refuse can be blocked or destroyed if excessively large particles of refuse drop from the refuse feed chute into the coil of the conveying screw. However, the avoidance of blockage of the conveying screw is necessary for continuous operation;
after all, new trash or refuse is as a rule supplied continuously. For problem-free conveying of the refuse it is also necessary that the refuse not stick to the screw or rotate with the screw coil. To achieve this, it is usual in conveying screws to dispose strips on the housing of its wall that protrude into the interstice between the conveying screw and the housing. When the conveying screw rotates, the material to be conveyed is prevented from rotating with the screw by the strips on the screw.
However, such strips are subject to severe wear.
From German Patent Applications DE-A 38 30 151, DE-A 38 30 152 and DE-A 38 30 153, pyrolysis reactors with a heater for refuse are known, in which supply lines are provided with outlet nozzles for air on the end for the sake of direct heating of the refuse in the low-temperature carbonization drum. These supply lines are extended through a hot gas housing on the low-temperature carbonization drum. The known constructions require special and therefore expensive sealing provisions.
The object of the invention is to embody a conveying device for refuse of the type referred to at the outset in such a way that it is possible to lay at least one supply line, which is intended to lead from outside into the pyrolysis reactor, with comparatively little effort or expense.
This object is attained in accordance with the invention in that at least one supply line leading from outside into the pyrolysis reactor is disposed in the space between the housing of the conveyor pipe and the pyrolysis reactor.
Blockage of the conveying screw should be avoided as much as possible. To prevent the refuse from rotating with the conveying screw, it may be provided that a deflection space exists between the conveying screw and the housing.
This space is formed by providing that from the longitudinal axis of the conveying screw, measured outward at right angles to the longitudinal axis, a variably large spacing remains free between the largest radius of the conveying screw and the housing wall, depending on the radial direction in which measurement is done. This assures that the conveyed refuse can come loose from the conveying screw from time to time, so that it does not rotate with the conveying screw.
Advantageously, no strips need to be attached to the inner wall of the housing as was previously usual for preventing the material from rotating with the conveying screw.
While such strips are subject to major wear, the present ~172634 conveying device can be operated largely with little wear.
The housing has a circular cross section, for example.
In a preferred exemple, the housing has a polygonal cross section. This polygonal cross section may be a trough-shaped cross section, with a lower polygonal part and an upper rectangular part. It may also be a polygon with sides of equal length.
These embodiments as well have the effect that the refuse to be conveyed will not rotate with the conveying screw.
The supply line or lines can serve any possible purposes, such as supplying air to the pyrolysis reactor.
It is preferably provided that the pyrolysis reactor commlln;cates on the inlet side with an inlet tube; that the conveyor pipe is sealed off on its end inside the inlet tube and is disposed stationary; and that the supply line is extended through the space between the inlet tube and the conveyor pipe.
The conveying device can be used at the inlet and/or the outlet of the pyrolysis reactor. In general terms, this involves a conveying device for feeding refuse into or discharging it out of a pyrolysis reactor rotatable about its longitudinal axis, which is preferably characterized by ~17263~
a) a tube, secured to the pyrolysis reactor, which is rotatable with the pyrolysis reactor about its longitudinal axis, b) a sealing ring secured to the end of the tube, c) a stationary conveyor pipe protruding into the tube, d) a counterpart ring for the sealing ring, the counterpart ring being secured to the outer circumference of the conveyor pipe, and e) at least one supply line, which leads from outside into the interior of the pyrolysis reactor via the space between the housing of the conveyor pipe and the tube.
Further advantageous features are defined by the dependent clalms .
Exemplary embodiments of the invention will be described below in further detail in conjunction with two drawing figures. Shown are:
Fig. 1, a conveying device for refuse, as part of an low-temperature carbonization system, seen in longitudinal section; and ~172634 Fig. 2, a lateral section in the direction II-II of Fig.
1.
In Fig. 1, a conveying device 2 for refuse A is provided, in which a drop chute or refuse feed chute 4 is connected via disconnectable securing means 6 to a stationary conveyor pipe 8. The conveyor pipe 8 here is embodied as a conveying screw trough. Its housing 8a has a preferably polygonal cross section, as shown in Fig. 2. The longitudinal axis of the housing 8a is shown at 9. The conveyor pipe 8 discharges into a pyrolysis reactor 10, in the present case an low-temperature carbonization drum rotating about its longitudinal axis 11, which is equipped with a relatively large number of heating tubes 12 parallel to the longitudinal axis 11. The heating tubes 12, only two of which are shown in Fig. 1 and 48 of which are shown in Fig. 2, are charged with hot gas h, such as hot air. They are firmly fastened in an end ring 12s, which is concentrically adjoined by an inlet tube 13. The end of the conveyor pipe 8 is located concentrically within this inlet tube 13. As will be described hereinafter, provision is made at that point for good sealing.
In the interior of the conveyor pipe 8, which in normal operational is stationary, there is a conveying screw 14, whose longitudinal axis 15 extends in the longitudinal ~7263~
direction thereof. The shaft 16 of the conveying screw 14 is driven via a gear 18 by a motor 20. The refuse feed chute 4 is disposed laterally of or vertically above the conveyor pipe 8, on its end. The fill opening for the refuse is marked 22, and the discharge opening is marked 24.
When refuse A is conveyed from the drop chute 4 to the low-temperature carbonization drum 10, it is necessary both to prevent oxygen from the air from reaching the low-temperature carbonization drum 10 from the inlet opening 22 via the discharge opening 24, and to prevent low-temperature carbonization gas from reaching the environment from the low-temperature carbonization drum 10 through the fill opening 22 in countercurrent with the conveyed refuse A. To do so, a middle portion 14a of the conveying screw 14 has a lesser pitch than the remainder of the conveying screw 14 or the initial portion 14b. As a result it is attained that the conveyed refuse A is more severely compacted in the region of this middle portion 14a than in the other regions, and as a result in the region of the portion 14a of the conveying screw 14 virtually the entire portion of the space in the housing 8a of the conveyor pipe 8 is filled with the refuse A.
The conveyed refuse A itself seals the housing 8a in gas-tight fashion there. Air cannot flow from the fill opening 22 to the discharge opening 24, and low-217263i temperature carbonization gas cannot flow in the oppositedirection. Downstream in the conveying direction of the compacting zone, which is located in the region of the portion 14a of the conveying screw 14, the conveying screw 14 again has a greater pitch. As a result, the packing of the refuse A, which packing extends over the entire cross section of the conveyor pipe 8, is loosened up again.
One important factor is that because of the geometrical arrangement, at least one supply line 32 leading from outside into the pyrolysis reactor 10 is disposed in the space 30 between the housing 8a of the conveyor pipe 8 and the pyrolysis reactor 10. In the present case, as shown in Fig. 2, there are three supply lines 32. The space 30 in question is located here between the housing 8a and the inlet tube 13. The supply lines 32 are located in the "free corners" outside the housing 8a. The supply lines 32 are intended for example for introducing air l, inert gas, water, or water vapor, which may be superheated. The air l introduced can be used for partial combustion of low-temperature carbonization gas in the pyrolysis reactor 10. Two air outlet nozzles or combustion nozzles on the supply line 32 are shown at 35 in Fig. 1. By introducing superheated steam, the refuse in the pyrolysis reactor is heated and dried directly.
Another significant factor is good sealing of the pyrolysis reactor 10 from the outside. To that end, a ~17263~
slide ring seal 40 is disposed on the end of the inlet tube 13. It comprises a co-rotating slide ring 42 and a stationary counterpart ring 44, both of which may be made of steel. The counterpart ring 44 is firmly attached to a ring 46, which is welded to the housing 8a with the aid of a weld seam 48.
To enable closing off the housing 8a of the conveyor pipe 8 in gas-tight fashion by means of the conveyed refuse A, the conveying device 2 should be operated fully filled.
To prevent relatively large, hard pieces of refuse A from blocking the conveying screw 14, variously located and configured deflection spaces 34 for such relatively large pieces may be provided inside the housing 8a, because of the geometrical shaping. In other words: The conveyor pipe 8 can have not merely the polygonal cross section shown but other cross sections instead. When the conveying screw 14 is rotating, the relatively large pieces to be conveyed are forced into these deflection spaces 34 and are transported along with the longitudinally moved refuse A in the deflection spaces 34, so that they cannot block the conveying screw 14. The deflection spaces 34 are as a rule located above or to the side of the conveying screw 14.
In Fig. 1, the refuse A in the rotating low-temperature carbonization drum is heated indirectly by the hot gas h by means of the heating tubes 12. This hot gas h is fed into the low-temperature carbonization drum 10 via a stationary hot-gas inlet housing ~not shown). The parallel heating tubes 12 are secured by one end to the bottom wall of the drum. The other end is secured to the bottom wall 12s, which forms a portion of the wall of a "cold" hot-gas outlet housing 50. From this housing 50, the hot gas h enters an outlet. To seal off the hot-gas outlet housing 50 from the rotating tube 10 and from the inlet tube 13, ring seals 52 and 54, respectively, are provided. Ring seals (not shown) are correspondingly provided to seal off the hot-gas inlet housing. From the interior of the low-temperature carbonization drum 10, or more precisely from the "hot" tube bottom, a discharge tube (not shown) is extended into the interior of a stationary discharge device. The low-temperature carbonization material entering this discharge device via the discharge tube is split, in the discharge device, into low-temperature carbonization gas and residue. The latter can be split and sorted out into various combustible and inert fractions by means of a suitable device (not shown) by the low-temperature carbonization combustion process, before the combustible portion is taken for combustion in a high-temperature combustion chamber (not shown).
It should also be pointed out that instead of or in addition to at least one supply line 32, it is naturally possible for an extraction line as well to be disposed in the space 30 between the housing 8a of the conveyor pipe 8 ~7263~
the space 30 between the housing 8a of the conveyor pipe 8 and the pyrolysis reactor 10 (or its inlet tube 13). This extraction line can serve for instance as a suction extraction tube for removing water vapor from the interior of the pyrolysis reactor 10. It should also be noted that a supply and/or extraction line 32 may be disposed at the outlet of the pyrolysis reactor 10, instead of the inlet, using an outlet tube that corresponds to the inlet tube 13.
Claims (8)
1. A device (2) for conveying refuse (A), wherein a refuse feed chute (4) is connected to a conveyor pipe (8), in the longitudinal direction of which is a screw conveyor (14), drivable by a motor (20) is disposed, wherein the conveyor pipe (8) discharges into a pyrolysis reactor (10), in particular into a low-temperature carbonization drum rotatable about its longitudinal axis (11), and wherein at least one supply line (32) leading from outside into the pyrolysis reactor (10) is disposed in the space between the housing (8a) of the conveyor pipe (8) and the pyrolysis reactor (10), characterized in that the pyrolysis reactor (10) communicates on the inlet side with an inlet tube (13), which has a smaller cross section than the pyrolysis reactor (10); that the conveyor pipe (8) is sealed off on its end inside the inlet tube (13) and is disposed stationary; that the housing (8a) of the conveyor pipe (8) has a nonround cross section; and that the supply line (32) is extended through the space (30) between the inlet tube (13) and the conveyor pipe (8).
2. The conveying device of claim 1, characterized in that the housing (8a) of the conveyor pipe (8) has a polygonal cross section.
3. The conveying device of claim 1 or 2, characterized in that the inlet tube (13) is provided on its end with a slide seal (40).
4. The conveying device of claim 1, 2 or 3, characterized in that a chamber (50) for the passage of heating gas (h) is slidingly secured to the inlet tube (13).
5. The conveying device of one of claims 1-4, characterized in that the supply line (32) is provided for transporting inert gas, water, water vapor, and in particular air (1).
6. The conveying device of one of claims 1-5, characterized in that the supply line (32) in the pyrolysis reactor (10) is provided with a outlet nozzle (35).
7. The conveying device of one of claims 1-6, characterized in that the conveyor screw (14) has segments (14a, 14b) of differing pitch.
8. A conveying device (2) for feeding refuse (A) into or discharging it out of a pyrolysis reactor (10) rotatable about its longitudinal axis (11), characterized by a) an inlet tube (13) secured to the pyrolysis reactor (10), which tube has a smaller cross section than the pyrolysis reactor (10) and is rotatable with the pyrolysis reactor (10) about its longitudinal axis, b) a sealing ring (42) secured to the end of the inlet tube (13), c) a stationary conveyor pipe (8) protruding into the inlet tube (13), d) a counterpart ring (44) for the sealing ring (42), the counterpart ring being secured to the outer circumference of the conveyor pipe (8), and e) at least one extraction or supply line (32), which leads from outside into the interior of the pyrolysis reactor (10) via the space (30) between a housing (8a) of nonround cross section of the conveyor pipe (8) and the inlet tube (13).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4332865A DE4332865A1 (en) | 1993-09-27 | 1993-09-27 | Device for transporting waste in a pyrolysis reactor |
| DEP4332865.2 | 1993-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2172634A1 true CA2172634A1 (en) | 1995-04-06 |
Family
ID=6498751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002172634A Abandoned CA2172634A1 (en) | 1993-09-27 | 1994-09-14 | Device for conveying refuse into a pyrolysis reactor |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US5709779A (en) |
| EP (1) | EP0721491B1 (en) |
| JP (1) | JP3121018B2 (en) |
| KR (1) | KR100304307B1 (en) |
| CN (1) | CN1056872C (en) |
| AT (1) | ATE187195T1 (en) |
| CA (1) | CA2172634A1 (en) |
| CZ (1) | CZ74896A3 (en) |
| DE (2) | DE4332865A1 (en) |
| DK (1) | DK0721491T3 (en) |
| ES (1) | ES2140554T3 (en) |
| HU (1) | HU216412B (en) |
| PL (1) | PL313586A1 (en) |
| PT (1) | PT721491E (en) |
| RU (1) | RU2100402C1 (en) |
| SK (1) | SK281845B6 (en) |
| WO (1) | WO1995009217A1 (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19700655C1 (en) * | 1997-01-10 | 1998-04-02 | Siemens Ag | Refuse conveyor, especially for feeding a pyrolytic refuse incinerator |
| DE19700653C1 (en) * | 1997-01-10 | 1998-04-02 | Siemens Ag | Grinding and feeding arrangement for refuse, especially for an incinerator |
| WO2002055631A1 (en) * | 2001-01-15 | 2002-07-18 | Takamo Industries Co., Ltd. | Plastic liquefying device |
| DE10202490C1 (en) * | 2002-01-23 | 2003-12-04 | Schwaebische Huettenwerke Gmbh | Device for introducing secondary fuels into an incineration plant |
| DE102004010407B4 (en) * | 2004-03-01 | 2013-02-21 | Kbi International Ltd. | Reactor for thermal waste treatment |
| DE102004016993B4 (en) * | 2004-04-02 | 2014-11-06 | Kbi International Ltd. | Thermal waste treatment reactor with a feed channel and thermal waste treatment process |
| CN2878390Y (en) * | 2006-04-07 | 2007-03-14 | 王新明 | Multi-functional full automatic remote constant temperature heat supply cracking device for waste and old tyre |
| RU2392543C2 (en) | 2008-02-22 | 2010-06-20 | Закрытое Акционерное Общество "Финансово-Промышленная Группа "Тезаурум" | Method and device for processing of domestic and industrial organic wastes |
| WO2010106538A1 (en) * | 2009-03-17 | 2010-09-23 | T.D.E. Recovery Technologies Ltd. | A pyrolytic reactor |
| CN101760220A (en) * | 2010-01-12 | 2010-06-30 | 肇庆市顺鑫煤化工科技有限公司 | Method for continuously coking coal liquefaction residuals and equipment thereof |
| CN102274845B (en) * | 2010-06-12 | 2015-03-18 | 上海中科岸达节能产品科技有限公司 | Municipal refuse low-temperature oxygen-free carbonization system equipment and low-temperature oxygen-free carbonization revolving furnace therefor |
| WO2012136344A1 (en) * | 2011-04-06 | 2012-10-11 | Olabil Vermögensverwaltungsgesellschaft Mbh | Conveying element for conveying a product, and method for carrying out a pyrolytic process using such a conveying element |
| EP3053725A1 (en) * | 2015-02-06 | 2016-08-10 | LANXESS Deutschland GmbH | Plug screw |
| CN105131998A (en) * | 2015-07-09 | 2015-12-09 | 北京中矿科能技术有限公司 | Biomass and coal medium-low temperature pyrolysis quality improving system and technology thereof |
| CN105505410B (en) * | 2015-11-30 | 2018-09-04 | 华电重工股份有限公司 | A kind of rotary dry distillation stove charging gear and its feeding method |
| US10280377B1 (en) * | 2016-03-24 | 2019-05-07 | Helge Carl Nestler | Pyrolysis and steam cracking system |
| EP3452562A4 (en) * | 2016-05-06 | 2020-03-11 | Aemerge LLC | Rotating drum device for use with carbonizer system and process of use thereof |
| CN106753460A (en) * | 2016-11-14 | 2017-05-31 | 新疆科立机械设备有限公司 | Feeding device is dried in self sealss water squeezing |
| CN107159686A (en) * | 2017-07-05 | 2017-09-15 | 成都世远科技有限公司 | A kind of vehicle-mounted movable stalk and waste plastics mulch film are while continuous processing system |
| CN109609155B (en) * | 2019-01-11 | 2021-03-05 | 扬州工业职业技术学院 | Biomass carbonization feeding device |
| US11561006B2 (en) * | 2020-10-23 | 2023-01-24 | M.S.T. Corporation | Apparatus and process for a kinetic feed plug screw |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1480152A (en) * | 1917-04-14 | 1924-01-08 | Gen Reduction Gas & By Product | Gas producer |
| US2542476A (en) * | 1947-04-07 | 1951-02-20 | Fred L Carlson | Grain cone |
| US2723226A (en) * | 1953-05-04 | 1955-11-08 | Lesher And Associates Inc | Low temperature carbonization process |
| US4142867A (en) * | 1974-07-04 | 1979-03-06 | Karl Kiener | Apparatus for the production of combustible gas |
| US4074979A (en) * | 1975-04-28 | 1978-02-21 | Mitsubishi Jukogyo Kabushiki Kaisha | Thermal decomposition apparatus |
| US4344821A (en) * | 1979-11-19 | 1982-08-17 | Angelo Ii James F | Apparatus for continuously carbonizing and activating carbonaceous materials |
| US4465556A (en) * | 1981-07-16 | 1984-08-14 | American Carbons, Inc. | Pyrolysis system with hot gas recirculation |
| DE3337621A1 (en) * | 1983-10-15 | 1985-04-25 | Veba Oel Entwicklungsgesellschaft mbH, 4660 Gelsenkirchen-Buer | METHOD FOR GENERATING SYNTHESIS GAS |
| US4734166A (en) * | 1987-02-05 | 1988-03-29 | Angelo Ii James F | Furnace for the selective incineration or carbonization of waste materials |
| DE3811820A1 (en) * | 1987-08-03 | 1989-02-16 | Siemens Ag | METHOD AND SYSTEM FOR THERMAL WASTE DISPOSAL |
| DE3830153A1 (en) * | 1988-09-05 | 1990-03-15 | Siemens Ag | Pyrolysis reactor with indirect and direct heating |
| DE3830152A1 (en) * | 1988-09-05 | 1990-03-15 | Siemens Ag | Pyrolysis reactor for thermal waste disposal |
| EP0360052B1 (en) * | 1988-09-05 | 1992-07-29 | Siemens Aktiengesellschaft | Pyrolysis reactor for the thermal disposal of waste |
| DE3830151A1 (en) * | 1988-09-05 | 1990-03-15 | Siemens Ag | Pyrolysis reactor with heating device |
-
1993
- 1993-09-27 DE DE4332865A patent/DE4332865A1/en not_active Withdrawn
-
1994
- 1994-09-14 CA CA002172634A patent/CA2172634A1/en not_active Abandoned
- 1994-09-14 ES ES94926780T patent/ES2140554T3/en not_active Expired - Lifetime
- 1994-09-14 AT AT94926780T patent/ATE187195T1/en not_active IP Right Cessation
- 1994-09-14 EP EP94926780A patent/EP0721491B1/en not_active Expired - Lifetime
- 1994-09-14 SK SK367-96A patent/SK281845B6/en unknown
- 1994-09-14 HU HU9600748A patent/HU216412B/en not_active IP Right Cessation
- 1994-09-14 JP JP07510044A patent/JP3121018B2/en not_active Expired - Fee Related
- 1994-09-14 DE DE59408969T patent/DE59408969D1/en not_active Expired - Fee Related
- 1994-09-14 DK DK94926780T patent/DK0721491T3/en active
- 1994-09-14 KR KR1019960701546A patent/KR100304307B1/en not_active IP Right Cessation
- 1994-09-14 PT PT94926780T patent/PT721491E/en unknown
- 1994-09-14 WO PCT/DE1994/001058 patent/WO1995009217A1/en not_active Application Discontinuation
- 1994-09-14 RU RU96108254/25A patent/RU2100402C1/en not_active IP Right Cessation
- 1994-09-14 CZ CZ96748A patent/CZ74896A3/en unknown
- 1994-09-14 PL PL94313586A patent/PL313586A1/en unknown
- 1994-09-14 CN CN94193564A patent/CN1056872C/en not_active Expired - Fee Related
-
1996
- 1996-03-27 US US08/625,404 patent/US5709779A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0721491A1 (en) | 1996-07-17 |
| SK36796A3 (en) | 1997-06-04 |
| DE59408969D1 (en) | 2000-01-05 |
| CN1131963A (en) | 1996-09-25 |
| EP0721491B1 (en) | 1999-12-01 |
| CZ74896A3 (en) | 1996-07-17 |
| JP3121018B2 (en) | 2000-12-25 |
| PT721491E (en) | 2000-05-31 |
| CN1056872C (en) | 2000-09-27 |
| ES2140554T3 (en) | 2000-03-01 |
| HU9600748D0 (en) | 1996-05-28 |
| PL313586A1 (en) | 1996-07-08 |
| SK281845B6 (en) | 2001-08-06 |
| KR100304307B1 (en) | 2001-11-22 |
| KR960704999A (en) | 1996-10-09 |
| JPH09501982A (en) | 1997-02-25 |
| US5709779A (en) | 1998-01-20 |
| DE4332865A1 (en) | 1995-03-30 |
| WO1995009217A1 (en) | 1995-04-06 |
| RU2100402C1 (en) | 1997-12-27 |
| HU216412B (en) | 1999-06-28 |
| HUT74783A (en) | 1997-02-28 |
| DK0721491T3 (en) | 2000-05-29 |
| ATE187195T1 (en) | 1999-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |